yttrogummite

例句：

1. 1. The karst region is famous for its unique geological features.
   喀斯特地区以其独特的地质特征而闻名。
2. 2.The karst aquifer is crucial for the local agriculture and drinking water supply.
   喀斯特含水层对当地农业和饮用水供应至关重要。
3. 3.The karst landscape is characterized by towering limestone pillars and underground rivers.
   喀斯特地貌以高耸的石灰石柱和地下河流为特征。